How to make yellowed plastic on household appliances white again

4. **Oxidation**: Over time, plastic may undergo oxidation, where the material reacts with oxygen in the air, causing changes in its appearance. This is often the case with older appliances that have been sitting unused for long periods.

### How to Restore Yellowed Plastic: Methods and Tips

Now that we understand the causes, let’s dive into how to make yellowed plastic white again. Below are several tried-and-true methods for restoring yellowed plastic on household appliances.

#### 1. **Baking Soda and Water Paste**

Baking soda is a gentle, yet effective, abrasive that can help remove yellowing from plastic surfaces. It works by gently scrubbing the surface without damaging the plastic underneath. When combined with water, baking soda forms a paste that can be applied to yellowed plastic to lift stains and discoloration.

**Instructions**:
1. Mix a small amount of baking soda with water to form a thick paste. The consistency should be similar to toothpaste.
2. Using a soft cloth or sponge, apply the paste to the yellowed plastic. Be sure to cover the entire discolored area.
3. Allow the paste to sit on the plastic for 10–15 minutes to break down the discoloration.
4. Use a soft cloth to scrub the plastic in a circular motion, focusing on the yellowed areas.
5. Rinse the plastic with clean water to remove the baking soda paste, and dry it thoroughly with a soft towel.

**Tip**: This method works best for light yellowing and may require repeated applications for stubborn stains.

#### 2. **Hydrogen Peroxide Soak**

Hydrogen peroxide is an excellent solution for whitening yellowed plastic and is often used by professionals to restore old plastic surfaces. It works by breaking down the chemical bonds responsible for yellowing, leaving the plastic looking cleaner and brighter.

**Instructions**:
1. Place your yellowed plastic item in a plastic container or a basin.
2. Pour 3% hydrogen peroxide into the container until the plastic is submerged. You can also use hydrogen peroxide gel if your appliance or item cannot be fully submerged.
3. Allow the plastic to soak for several hours (ideally overnight) to allow the hydrogen peroxide to work its magic.
4. After soaking, remove the plastic and gently scrub it with a soft cloth or sponge to remove any remaining yellowing.
5. Rinse thoroughly with clean water and dry with a soft towel.

**Tip**: Hydrogen peroxide works best when exposed to UV light. If possible, leave the container outside in the sun while the plastic is soaking to enhance the whitening effect.

#### 3. **Use of the Sun (UV Light Exposure)**

One of the simplest and most natural ways to restore yellowed plastic is through the power of UV light. When combined with hydrogen peroxide, the sun’s UV rays can speed up the whitening process, particularly for older plastic items that have yellowed significantly.

**Instructions**:
1. Clean the plastic surface with a damp cloth to remove dirt and grime.
2. Apply hydrogen peroxide to the yellowed areas using a sponge or cloth.
3. Leave the plastic item in direct sunlight for several hours or even overnight, depending on the severity of the yellowing. The UV rays will help break down the stains and whiten the plastic.
4. After several hours, bring the item back inside, and scrub it gently with a soft cloth to remove any remaining yellowing.
5. Rinse thoroughly with clean water and dry.

**Tip**: This method works best for larger items that can be easily placed in the sun, such as plastic appliances, furniture, or containers.

#### 4. **Toothpaste**

Toothpaste is not only effective for cleaning teeth but can also be used to whiten yellowed plastic surfaces. The mild abrasives in toothpaste work to polish the plastic and remove stains without damaging the material.

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